Why is it considered undesirable to land off the end of a runway?

Landing off the end of a runway is considered undesirable primarily because of the presence of approaching and departing aircraft. Airports are high-traffic areas, and the airspace around runways is often crowded with other planes either on final approach or taking off. A skydiver landing in this area can create a dangerous situation not only for themselves but also for the pilots and passengers of the aircraft. The risk of collision with an aircraft is substantial in this vicinity, as pilots may not be aware of a skydiver's presence, leading to potentially fatal outcomes.

While other factors, such as ground conditions and obstacles, are important considerations in landing safely, the immediate danger posed by aircraft movements makes landing beyond the end of the runway particularly perilous. Prioritizing safety in relation to air traffic is paramount for skydivers, who must always be aware of their surroundings.